Home / Custom / Optical Components / Optical Mirror / Off-Axis Parabolic (OAP) Mirror 
Off-axis parabolic mirror (OAP) is a special type of optical mirror that can focus or collimate light beams without spherical aberration, just like a regular parabolic mirror. Its unique "off-axis" structure cleverly moves the focal point outside the incident light path, thus avoiding the central obstruction problem common in traditional designs.
The off-axis design allows the reflected beam to exit at an angle, completely avoiding the incident light path. This achieves unobstructed light transmission, preventing energy loss and image quality interference.
Perfectly focuses parallel light, eliminating spherical aberration. Furthermore, due to its reflective design, it is completely free of chromatic aberration, making it ideal for broadband or multi-color light systems.
The total internal reflection design eliminates almost all absorption losses from transmission materials, making it particularly suitable for high-power laser applications.
| Parameter | Typical values/ranges |
|---|---|
| Substrate Material | Optical glass: fused silica (JGS2) etc. |
| Effective Focal Length (EFL) | 15.0 mm ~ 150 mm |
| Off-axis Angle | 30°, 45°, 90° etc. |
| Surface Accuracy | λ/4, λ/8, λ/10 (@633 nm) |
| Clear Aperture | >90% of physical diameter |
| Coating Options | Aluminum Coating (450nm-20μm); Silver Coating (450nm-20μm); Gold Coating (800nm-20μm); UV-Enhanced Aluminum Coating (250-450nm). |
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